CN105202276A - Renovation process method of old seawater carbon steel pipeline - Google Patents
Renovation process method of old seawater carbon steel pipeline Download PDFInfo
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- CN105202276A CN105202276A CN201510683061.7A CN201510683061A CN105202276A CN 105202276 A CN105202276 A CN 105202276A CN 201510683061 A CN201510683061 A CN 201510683061A CN 105202276 A CN105202276 A CN 105202276A
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- carbon steel
- old carbon
- steel tube
- renovation
- steel pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention discloses a renovation process method of an old seawater carbon steel pipeline. The method comprises the following steps: evaluating the damage degree of the old carbon steel pipeline to determine whether the old carbon steel pipeline meets the renovation conditions; if the old carbon steel pipeline meets the renovation conditions, carrying out sand blasting rust-removal treatment on the inner wall of the old carbon steel pipeline; then, carrying out rotational moulding and lining renovation treatment on the inner wall of the pipeline; if the old carbon steel pipeline has rubber lining, treating the old carbon steel pipeline as follows before evaluating the damage degree of the old carbon steel pipeline: carrying out pollution-free incineration and environmental-friendly degradation treatment on the old carbon steel pipeline by using an environment-friendly hot cleaning furnace in an environment of a low oxygen content and a high temperature of 440 DEG C, after the oil paint on the rubber lining and the old carbon steel pipeline are burned into powder, cooling the old carbon steel pipeline to room temperature. According to the invention, sand blasting rust-removal treatment and rotational moulding and lining renovation treatment are carried out on the inner wall of the old carbon steel pipeline meeting the renovation conditions, wastes are reused, and the plastic lining pipeline subjected to renovation is not only anti-corrosion, but also is prolonged in service life; meanwhile, the cost is greatly reduced.
Description
Technical field
The present invention relates to renovation field, be specifically related to the renovation technology method of the old carbon steel piping of seawater.
Background technique
The etching problem of boats and ships sea water piping system exists always, especially at South China Sea, seawater salt concentration is large, temperature and humidity is high, marine growth is many, the corrosion of sea water piping system is even more serious, carbon steel tubing is former is the tubing comparing seawater corrosion resistance, but, because coastal seawater is seriously polluted, modern ships power increases, the ability of the erosion corrosion that the increase that seawater flow tackled by carbon steel tubing causes is unable to do what one wishes, the etching problem of ships and light boats carbon steel tube is day by day serious, the seawaterline of large discharge should be replaced by more corrosion resistant corronil material as far as possible, and in the market also not to the renovation processing method of old carbon steel tube, old carbon steel tube can only be scrapped process, cause cost higher.
Summary of the invention
Technical problem to be solved by this invention is in the market not to the renovation processing method of old carbon steel tube, old carbon steel tube can only be scrapped process, cause the problem that cost is higher.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide the renovation technology method of the old carbon steel piping of a kind of seawater, comprises the following steps:
S1: the assessment old carbon steel tube being carried out to damaged condition, to determine whether described old carbon steel tube meets renovation and utilize condition;
S2: determine that described old carbon steel tube meets after renovation utilizes condition, derusting by sandblasting process is carried out to the inner-walls of duct of described old carbon steel tube;
S3: after described derusting by sandblasting process completes, carries out the process of rotational moulding renovation lining to described inner-walls of duct;
Wherein, S1 specifically comprises the following steps:
S11: utilize ultrasonic thickness gage to carry out thickness measuring process to described old carbon steel tube, and according to the pipe thickness of described old carbon steel tube with perforation size is repaired described old carbon steel tube, soldering;
S12: after described repairing, soldering complete, utilizes described ultrasonic thickness gage to carry out thickness measuring process to described old carbon steel tube again, to determine whether described old carbon steel tube meets renovation and utilize condition;
If described old carbon steel tube has rubber lining, then before step S11, following process is done to described old carbon steel tube:
Utilize the clean stove of environment protection thermal, under the environment of hypoxemia, 440 celsius temperatures, the process of nuisanceless burning environment-friendly degradable is carried out to described old carbon steel tube, after the paint burning on described rubber lining and described old carbon steel tube is powdered, described old carbon steel tube is cooled to room temperature.
In technique scheme, S3 specifically comprises the following steps:
S31: according to thickness of inner lining specification requirement, calculates backing layer doses according to the surface area of described inner-walls of duct and the product of liner thickness, and adds Powdered PE according to described backing layer doses at described pipe interior;
S32: adopt rotate shuttle type rotational molding machine to described old carbon steel tube carry out biaxially 360 degree ceaselessly rotate, meanwhile, described rotation shuttle type rotational molding machine carries out Synchronous Heating according to the tube wall of heating-up temperature to described old carbon steel tube;
S33: described Powdered PE under the effect of described rotation shuttle type rotational molding machine, after heat absorption melting, be attached to described inner-walls of duct, forms liner PE layer;
S34: described liner PE layer stops rotation and the heating of described rotation shuttle type rotational molding machine, and carries out the shaping cooling processing of tube wall to described old carbon steel tube after being formed;
S35: after described liner PE layer cooling, utilize electromagnetism coating thickness detector to carry out thickness measuring process to described liner PE layer, and grinding disposing is carried out to the burr on described liner PE layer.
In technique scheme, described processing temperature is 260 degrees Celsius.
In technique scheme, the mode of the shaping cooling processing of described tube wall is air-cooled.
The present invention, by carrying out the assessment of damaged condition to old carbon steel tube, the old carbon steel tube of condition is utilized to carry out derusting by sandblasting process and the process of rotational moulding renovation lining of inner-walls of duct to meeting renovation, refuse reclamation, plastics lined pipe road after renovation not only reaches etch-proof object, extend the working life of pipeline, also greatly reduce cost simultaneously.
Accompanying drawing explanation
The renovation technology method flow diagram of the old carbon steel piping of a kind of seawater that Fig. 1 provides for the embodiment of the present invention;
The flow chart of the step S1 that Fig. 2 provides for the embodiment of the present invention;
The flow chart of the step S3 that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with specification drawings and specific embodiments, the present invention is described in detail.
Embodiments provide the renovation technology method of the old carbon steel piping of a kind of seawater, as shown in Figure 1, the method comprises the following steps:
Step S1, old carbon steel tube is carried out to the assessment of damaged condition, to determine whether it meets renovation and utilize condition.
As shown in Figure 2, step S1 specifically comprises the following steps:
Step S11, ultrasonic thickness gage is utilized to carry out thickness measuring process to old carbon steel tube, and according to the pipe thickness of old carbon steel tube with perforation size is repaired old carbon steel tube, soldering.
Step S12, in repairing, after soldering completes, ultrasonic thickness gage is again utilized to carry out thickness measuring process to old carbon steel tube, to determine whether old carbon steel tube meets renovation and utilize condition.
If old carbon steel tube has rubber lining, then before step S11, following process is done to old carbon steel tube:
Utilize the clean stove of environment protection thermal, under the environment of hypoxemia, 440 celsius temperatures, burning disposal is carried out to old carbon steel tube, after the paint burning on rubber lining and old carbon steel tube is powdered, old carbon steel tube is cooled to room temperature.
In the market not to the renovation processing method of old carbon steel tube, process can only be scrapped, but after this programme can make seawater old carbon steel tube renovation process, extend the working life of the old carbon steel tube of seawater, refuse reclamation, greatly reduces cost.
Step S2, determine that old carbon steel tube meets after renovation utilizes condition, derusting by sandblasting process is carried out to the inner-walls of duct of old carbon steel tube.
It should be noted that, derusting by sandblasting adopts pressurized air to be that (compressed-air actuated working pressure is 4-7Mpa to power, and efficiency is 10-15m
2/ h), to form high velocity jet bundle by material spray (pomegranate stone sand, copper ore, silica sand, emery, iron sand, SEMEN AMOMI LONGILIGULA) high velocity jet to needing inner-walls of duct to be processed, by material spray to the impact of the inner-walls of duct of corrosion and shear action, inner-walls of duct surface is made to obtain certain turbidity test and different roughness, the mechanical property on inner-walls of duct surface improves, improve the fatigue resistance of inner-walls of duct, add the adhesion between inner-walls of duct and coating, extend the durability of film, be also conducive to levelling and the decoration of coating.
Step S3, after derusting by sandblasting process completes, rotational moulding renovation lining process is carried out to inner-walls of duct.
As shown in Figure 3, step S3 specifically comprises the following steps:
Step S31, according to thickness of inner lining specification requirement, calculate backing layer doses according to the surface area of described inner-walls of duct and the product of liner thickness, and add Powdered PE (polyethylene) according to described backing layer doses at described pipe interior.
Step S32, adopt rotate shuttle type rotational molding machine to old carbon steel tube carry out biaxially 360 degree ceaselessly rotate, meanwhile, rotation shuttle type rotational molding machine carries out Synchronous Heating according to processing temperature to the tube wall of old carbon steel tube.
Wherein, processing temperature is 250-260 degrees centigrade, can adjust accordingly according to the difference of pipe material to processing temperature, also can set the rotational time rotating shuttle type rotational molding machine according to demand.
Step S33, Powdered PE, under the effect rotating shuttle type rotational molding machine, are attached to inner-walls of duct after heat absorption melting, form liner PE layer.
After step S34, liner PE layer are formed, the rotation of the shuttle type rotational molding machine that stops the rotation and heating, and the shaping cooling processing of tube wall (air-cooled) is carried out to old carbon steel tube.
Step S35, until liner PE layer cooling after, utilize magnetisable coating thickness meter to carry out thickness measuring process to liner PE layer, and grinding disposing carried out to the burr on liner PE layer.
Rotate inner lining process and ensure that liner PE layer free of pinholes, No leakage, without any weld seam, and this technique is to the external and internal compositions no requirement (NR) of pipeline, no matter how complicated pipeline configuration is, all energy machine shaping, comparatively large at pipeline, can also site operation under transporting inconvenient situation.In addition by the requirement of fed sheet of a media, can the various types of plastics of liner, the thermoplastics such as such as polyethylene (PE), heat-proof polythene (PE-RT) and crosslinked polyethylene (PE-X), the intensity of the existing steel pipe of these thermoplastics, has again that plastic tube is corrosion-resistant, wear-resistant, fluid resistance is little, nontoxic, corrosion-resistant, non flouling behaviour and an advantage such as thermal conductivity is low.Steel lining plastic Propylene pipes any surface finish, when carrying liquid, resistance coefficient is little, and not mixed endophytic bacteria, has good anti-fat, good antiscale property ability; Carbon steel lining PE pipeline in the ordinary course of things larger than the Fluid Volume of the steel pipe market with same diameter 10% ~ 20%, transmitting power consumption reduces by more than 15%, extends 10 times working life and has a surplus.Therefore can say, carbon steel lining PE pipeline is energy-efficient etch-proof novel pipeline material again, be widely used in the various fields such as oil, chemical industry, building, communication, electric power and underground gas pipeline, be the better product substituting traditional galvanized pipe at present, be described as environmental protection tubing.
Rubber lining in the market cannot ensure the smooth of inner-walls of duct, covering inner-walls of duct that even at all cannot be complete, and there is seam after sulfuration, in this programme, plastics lined pipe road after renovation at least can adhere to re-using more than 3 years under normal circumstances, this not only reaches etch-proof object, extends the working life of pipeline, also greatly reduces cost simultaneously.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present invention, and every have identical or close technological scheme with the present invention, all falls within protection scope of the present invention.
Claims (4)
1. the renovation technology method of the old carbon steel piping of seawater, is characterized in that, comprise the following steps:
S1: the assessment old carbon steel tube being carried out to damaged condition, to determine whether described old carbon steel tube meets renovation and utilize condition;
S2: determine that described old carbon steel tube meets after renovation utilizes condition, derusting by sandblasting process is carried out to the inner-walls of duct of described old carbon steel tube;
S3: after described derusting by sandblasting process completes, carries out the process of rotational moulding renovation lining to described inner-walls of duct;
Wherein, S1 specifically comprises the following steps:
S11: utilize ultrasonic thickness gage to carry out thickness measuring process to described old carbon steel tube, and according to the pipe thickness of described old carbon steel tube with perforation size is repaired described old carbon steel tube, soldering;
S12: after described repairing, soldering complete, utilizes described ultrasonic thickness gage to carry out thickness measuring process to described old carbon steel tube again, to determine whether described old carbon steel tube meets renovation and utilize condition;
If described old carbon steel tube has rubber lining, then before step S11, following process is done to described old carbon steel tube:
Utilize the clean stove of environment protection thermal, under the environment of hypoxemia, 440 celsius temperatures, the process of nuisanceless burning environment-friendly degradable is carried out to described old carbon steel tube, after the paint burning on described rubber lining and described old carbon steel tube is powdered, described old carbon steel tube is cooled to room temperature.
2. the method for claim 1, is characterized in that, S3 specifically comprises the following steps:
S31: according to thickness of inner lining specification requirement, calculates backing layer doses according to the surface area of described inner-walls of duct and the product of liner thickness, and adds Powdered PE according to described backing layer doses at described pipe interior;
S32: adopt rotate shuttle type rotational molding machine to described old carbon steel tube carry out biaxially 360 degree ceaselessly rotate, meanwhile, described rotation shuttle type rotational molding machine carries out Synchronous Heating according to the tube wall of processing temperature to described old carbon steel tube;
S33: described Powdered PE under the effect of described rotation shuttle type rotational molding machine, after heat absorption melting, be attached to described inner-walls of duct, forms liner PE layer;
S34: described liner PE layer stops rotation and the heating of described rotation shuttle type rotational molding machine, and carries out the shaping cooling processing of tube wall to described old carbon steel tube after being formed;
S35: after described liner PE layer cooling, utilize magnetisable coating thickness meter to carry out thickness measuring process to described liner PE layer, and grinding disposing is carried out to the burr on described liner PE layer.
3. method as claimed in claim 2, it is characterized in that, described processing temperature is 260 degrees Celsius.
4. method as claimed in claim 2, it is characterized in that, the mode of the shaping cooling processing of described tube wall is air-cooled.
Priority Applications (1)
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| CN201510683061.7A CN105202276B (en) | 2015-10-20 | 2015-10-20 | The renovation technology method of the old carbon steel piping of seawater |
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| CN201510683061.7A CN105202276B (en) | 2015-10-20 | 2015-10-20 | The renovation technology method of the old carbon steel piping of seawater |
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| CN105202276A true CN105202276A (en) | 2015-12-30 |
| CN105202276B CN105202276B (en) | 2017-11-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086443A (en) * | 2018-01-31 | 2018-05-29 | 杭州市市政工程集团有限公司 | A kind of the old and new's sewage communicating pipe alternating construction connection structure |
| CN108247928A (en) * | 2017-12-26 | 2018-07-06 | 重庆安特管业有限公司 | A kind of renovation processing technology of seawater pipeline |
| CN113492295A (en) * | 2020-11-07 | 2021-10-12 | 胜利油田金岛工程安装有限责任公司 | Shaping process of steel pipe with unequal wall thickness |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108247928A (en) * | 2017-12-26 | 2018-07-06 | 重庆安特管业有限公司 | A kind of renovation processing technology of seawater pipeline |
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| CN108086443B (en) * | 2018-01-31 | 2024-04-02 | 杭州市市政工程集团有限公司 | Alternate construction connection structure of new and old sewage communicating pipe |
| CN113492295A (en) * | 2020-11-07 | 2021-10-12 | 胜利油田金岛工程安装有限责任公司 | Shaping process of steel pipe with unequal wall thickness |
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| CN105202276B (en) | 2017-11-17 |
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